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/* $OpenBSD: pthread_once.c,v 1.1 2017/10/16 01:46:09 guenther Exp $ */
/*
* Scott Cheloha <scottcheloha@gmail.com>, 2017. Public Domain.
*/
#include <pthread.h>
#include <unistd.h>
#include "test.h"
pthread_once_t once_control = PTHREAD_ONCE_INIT;
int done = 0;
void
init_routine(void)
{
static int first = 1;
if (first) {
first = 0;
CHECKr(pthread_cancel(pthread_self()));
pthread_testcancel();
}
done = 1;
}
void *
thread_main(void *arg)
{
pthread_once(&once_control, init_routine);
return NULL;
}
int
main(int argc, char **argv)
{
pthread_t tid;
CHECKr(pthread_create(&tid, NULL, thread_main, NULL));
CHECKr(pthread_join(tid, NULL));
ASSERT(!done);
alarm(5); /* if this rings we are probably deadlocked */
CHECKr(pthread_once(&once_control, init_routine));
alarm(0);
ASSERT(done);
SUCCEED;
}
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